Question 390 · LDEK · Irrigation and intracanal medicaments

Which irrigant does not remove any part of the smear layer?

  1. A. citric acid.
  2. B. chlorhexidine.
  3. C. NaOCl.
  4. D. EDTA.
  5. E. each of the above does remove organic or inorganic part of the layer.
Hint

The smear layer has an organic and an inorganic part; find the irrigant that neither dissolves tissue nor chelates calcium.

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